This is something I really see as a potential roadblock as mainstream adoption increases. I think all of us that have been in crypto for a while understand the volatility and risks. Honestly, I'm not even surprised by huge thefts and scams much anymore. New users who just joined Steem or just bought their first bit of ETH on Coinbase may not be ready for just how much of an absolute wild west crypto is. Experience and education are, in my opinion, one of the best defences against this. Even then, sometimes the exchanges or coins that scam aren't obvious (Mt.Gox was a surprise to many) and some that are to those who have seen it before(BitConnect...). I'm not even really sure what the most viable longterm solution is. It seems that anonymity brings out the worst in some of us.